Head suspension lift cam adjustment apparatus

Abstract

A method, apparatus, and a disk file for adjusting the height of a set of load/unload lift cams with respect to the axial height of an associated stack of disks. The method steps comprise supporting load/unload lift cams with an adjustment tool, measuring the relative height of the load/unload lift cams with respect to the stack of disks in the axial direction with a non-contact transducer, and fixing the load/unload lift cams at a registered height with respect to the stack of disks.

We claim:  
     
       1. An adjustment tool for adjusting the height of a set of load/unload lift cams with respect to the axial height of an associated stack of disks, comprising: 
       a support for engaging said set of load/unload lift cams;  
       a non-contact measurement transducer mounted on said support for measuring the vertical distance to said stack of disks; and  
       a positioner to move said support to a registered height with respect to said stack of disks measured by said non-contact measurement transducer.  
     
     
       2. The adjustment tool of claim  1 , wherein: 
       said support additionally comprises a registration surface for registering said set of load/unload lift cams with respect to said support and thereby with respect to said mounted non-contact measurement transducer.  
     
     
       3. The adjustment tool of claim  2 , wherein: 
       said support additionally comprises a clamp for engaging said set of load/unload lift cams.  
     
     
       4. The adjustment tool of claim  2 , wherein: 
       said non-contact measurement transducer comprises an eddy current probe.  
     
     
       5. The adjustment tool of claim  2 , wherein: 
       said non-contact measurement transducer comprises a photoelectric distance transducer.